Steps to reproduce:
1. Import an stl model into Chitubox.
2. Add supports manually
3. Duplicate the model a couple of times to fill the build plate.
4. Save the project
5. Reopen the project.
6. Add another support manually
Chitubox now freezes for a moment and crashes without any error message.
This only happens after a certain number of supports are added - hence step 3.
This happens in version 1.63 and 1.61, but NOT 1.5.